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arXiv 0910.5573hep-lathep-ph
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用改进的交错费米子(II)SU测定$B_K$(2)手征微扰理论拟合

Determination of $B_K$ using improved staggered fermions (II) SU(2) chiral perturbation theory fit

Hyung-Jin Kim, Taegil Bae, Jangho Kim, Jongjeong Kim, Kwangwoo Kim, Boram Yoon, Weonjong Lee, Chulwoo Jung, Stephen R. Sharpe

摘要:

我们目前的结果$B_K$计算HYP涂抹改进交错费米子的MILC asqtad晶格。在本报告中,使用SU(2)交错手征微扰理论(SChPT)的结果分析了数据。我们概述了非线性光学SU(2)SChPT结果的推导,解释了我们的拟合过程,并概述了我们如何估计系统误差。我们还显示了基于SU(2)和SU(3)的轻海夸克质量和晶格间距的依赖性。我们从SU(2)分析得到的初步结果是$B_K(\text{NDR}, μ= 2 \text{GeV}) = 0.512 \pm 0.014 \pm 0.034$和$\hat{B}_K = B_K(\text{RGI})= 0.701 \pm 0.019 \pm 0.047$。这比我们从SU(3)分析得到的结果更精确。这与用价畴壁费米子得到的结果一致

英文摘要:

We present results for $B_K$ calculated using HYP-smeared improved staggered fermions on the MILC asqtad lattices. In this report, the data is analyzed using the results of SU(2) staggered chiral perturbation theory (SChPT). We outline the derivation of the NLO SU(2) SChPT result, explain our fitting procedure, and outline how we estimate systematic errors. We also show the light sea-quark mass and lattice spacing dependence for both SU(2) and SU(3)-based analyses. Our preliminary result from the SU(2) analysis is $B_K(\text{NDR}, μ= 2 \text{GeV}) = 0.512 \pm 0.014 \pm 0.034$ and $\hat{B}_K = B_K(\text{RGI})= 0.701 \pm 0.019 \pm 0.047$. This is somewhat more accurate than our result from the SU(3) analysis. It is consistent with results obtained using valence domain-wall fermions

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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